Improvement in conveyer-blocks



drilled tant WELMAN DE WITT, 0F TALLMADGE. MICHIGAN.

Letters Patent No. 102,37 7, April 26, 1870.

IMPROVEMENT IN CONVEYERBLOCKS.

The Schedule referred to in ther-1e Letters Patent and making part of the same.

To all 'gl/'hom it may concern: A

Beit known that I, WELMAN DE WITT, of Tallmadge, in the county of Ottawa and State of Michi gan, have invented certain new and useful Improvements in Gonveyer-Blocks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawingsand to the letters of reference marked thereon, which forni a part of this specification, in which- Figure 1 represents a rside eleration of my machine;

Figure 2, a plan; and

Figure 3 represents a side view of the block, with one side removed, showing its internal construction.

To enable Others skilled in the art to. make and employ my invention, I will now proceed to describe its construction and operation.

A represents the frame of my machine, which consists ofthe ground-sill B and uprights C C, said uprights being furnished on cach side, at their upper ends, with the hars or ways I) D, which are placed in an inclined position, the cause of which will be more fully apparent hereafter.

Ihese bars or ways are cut or provided at their lower portions with two slots, into which are pivoted the stays g g.

Secured at one end to the sides of the bars D D, and having ltheir opposite ends resting against the stays g g, are the springs h h.

11i designates the, movable block, made as represented in rigs. 1 and 2, and situated between the ways 1) D, upon which it is conveyed back and forth by means of wheels c e. This block is made or provided on cach of its sides with a vertical groove, into which slides up and down the staple-like device F.

'Ihc lower part of this device, it will be observed, is bulgcd or formed larger than its upper end, the object of which is to enable it, when operated, to diseng. ge the stays g-g from their recesses made in the block E, and thus allow said'block to be set at liberty.

The upperends of this device are bent, soas to rest on the top of block E.

d represents a shive pivoted inside of block E, and f a pawl, which its pivotedat its upper end, and hav- -ing its lower cud pressing against the shive 1l.

i designates a spring, which is heut so as to keep the pawl in place against the shive d.

j is a movable bar.

One end of said bar is made to fit ina recess on the pawl f, and its opposite end caused to project outward a short distance beyond the block E, and rest against the upright C.

e represents a cord, secured at one end to the coneshaped block lc, and passing over the shive d. From thence it is conveyed over a pulley placed in the upper end of the ways D D,I and then allowed to enter alnopenng or hole near the lower end of the vupright O, after which it is secured to the horse. i

l designates a guide, fastened toV the inner side of the lowerupright C, near its upper end.

Said guide is groovcd so as to correspond with the cone-shaped block lc, in Order to give the desired inclination to said block, and thus allow it, when drawn up, to strike against the staple-like device 14.;

u designates a knot in the cord, near its lower end, the object of which will be seen hereafter.

In operating my machine the horse will be hitched to the Outer end of cord c. The block 7c will nowbe drawn up until the staple-like device 1 ,vwith which it comes in contact, shall have been pushed up so that its bulged part will press the stays y g out, and thus disengage them from block E, and allow said block to be left free to operate.

At the same time the knot in cord c will have passed the top of shve d, and the pawl f being rclieved, will be pressed by the spring i, or its own weight on the cord c, behind theknot.

Ihe Othce of the knotv s to prevent the weight attached to block k from drawing the cord past the pawl, and thus causing the weight to descend before it reaches the upper end of the ways 1) l).

As soon' as the block k with its freight has reached the upper end of the ways andthe freight discharged, thehorse will be hackcd,'and the block E will descend ou the ways to its original position.

It will be remarked that a hook may be attached to the cord at the lower end Of the block k, when it is desired to elevate hay, or a box or other vessel may be likewise used, when desired to raise coal or; other material.

I do not claim the use of a movable block, traveling l'on inclined ways and held stationary until released by the weight when raised, as-such devices have been heretofore patented; but

What I claim, and desire to secure by Letters-Patent, is

'Ihe combination of the block E and staple-like device F with the stays g, springs h, guide l, and block k, when arranged and operating substantially as described. v

In testimony that I claim thc foregoing as my own, I aflix my signature` in presence of two witnesses.

WELMAN DE WITT.

` Witnesses:

GEO. W. DANFORTH, JOSEPH BROWN. 

